redoubtable
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C2 adjective /rɪˈdaʊ.tə.bəl/

redoubtable

Meaning
formidable, especially as an opponent; inspiring fear or respect
Example
She was a redoubtable leader who commanded respect from all.
C2 adjective /rɪˈfɛrəbəl/

referable

Meaning
able to be related or directed to something
Example
The issue is referable to the new policy changes.
C2 verb /ˈræpsəˌdaɪz/

rhapsodize

Meaning
to speak or write with great enthusiasm and admiration
Example
He would often rhapsodize about his travels to Europe.
C2 noun /ˌræʃioʊsɪˈneɪʃən/

ratiocination

Meaning
the process of reasoning or logical thinking
Example
His ratiocination impressed the judges during the debate.
C2 noun /ruːˈeɪ/

roue

Meaning
A man devoted to a life of sensual pleasure; a debauched man.
Example
The old roue squandered his fortune on gambling and women.
C2 adjective /rɪˈkæl.sɪ.trənt/

recalcitrant

Meaning
Having an obstinately uncooperative attitude toward authority or discipline.
Example
The recalcitrant student refused to follow rules.
C2 noun /ˌrep.ɑːˈtiː/

Repartee

Meaning
conversation or speech characterized by quick, witty comments or replies
Example
The dinner party was filled with brilliant repartee between the guests.
C2 noun /rɪˈdʒɔɪndər/

rejoinder

Meaning
a quick or witty reply; a response to a remark or argument
Example
His sharp rejoinder silenced the crowd.
C2 noun /ˈreɪdɪks/

radix

Meaning
the base or root of something; the number on which a system of numeration is built
Example
In mathematics, the decimal system has a radix of ten.
C2 noun /rɪˌkrɪmɪˈneɪʃən/

recrimination

Meaning
an accusation made in response to an accusation; mutual blaming
Example
The debate quickly descended into mutual recriminations.
C2 adjective /ˌriːkruːˈdɛsənt/

recrudescent

Meaning
reviving or breaking out again after a period of abatement
Example
Recrudescent tensions threatened the fragile ceasefire.
C2 verb /ruː/

rue

Meaning
To feel regret or sorrow about something.
Example
She will rue the day she trusted him.
C2 noun /ˈrɛk.tɪ.tjuːd/

rectitude

Meaning
Morally correct behavior or thinking; righteousness and integrity.
Example
His rectitude earned him respect in society.
C2 noun /ˌriːkruːˈdɛsəns/

recrudescence

Meaning
a new outbreak or revival of something that had subsided, especially an undesirable condition
Example
Health officials warned of a recrudescence of measles in several districts.
C2 noun /rɪˌnʌnsiˈeɪʃən/

renunciation

Meaning
the formal rejection or giving up of something, usually a belief, claim, or way of life
Example
His renunciation of worldly pleasures impressed the monks.
C2 adjective /rəˈpeɪ.ʃəs/

rapacious

Meaning
having an extreme desire to take things for oneself, greedy
Example
The rapacious landlord raised the rent without reason.
C2 verb /ˈræŋ.kəl/

rankle

Meaning
To cause continuing annoyance or resentment.
Example
His unfair criticism continued to rankle her for days.
C2 noun /rʌmp/

Rump

Meaning
the hindquarters or buttocks; the lower back area
Example
The horse injured its rump during the fall.
C2 noun /ˈrɛlɪkwɛri/

reliquary

Meaning
a container for holy relics
Example
The ancient reliquary was decorated with gold and precious stones.
C2 verb /rɪˈsɪnd/

rescind

Meaning
to revoke, cancel, or repeal a law, order, or agreement
Example
The company decided to rescind the job offer.
C2 adjective /rɪˈfræktəri/

refractory

Meaning
Stubborn or resistant to control, authority, or treatment.
Example
The refractory child refused to follow the teacher's instructions.
C2 noun /rɪˈfɛktəri/

refectory

Meaning
a dining hall, especially in a monastery, convent, or school
Example
Students had lunch in the refectory.
C2 verb /rɛtʃ/

retch

Meaning
to make the sound and movement of vomiting without bringing anything up
Example
The smell of spoiled food made him retch violently.
C2 noun /ˈrɛdʒɪsaɪd/

regicide

Meaning
the act of killing a king
Example
The conspirators were executed for committing regicide.
C2 adjective /roʊˈtʌnd/

rotund

Meaning
round or plump in shape; full in sound
Example
The rotund cat struggled to climb the fence.
C2 adjective /ˈreɪ.moʊs/

ramose

Meaning
having many branches.
Example
The ramose tree shaded the entire garden.
C2 verb /ˈrʌmpəl/

rumple

Meaning
to make something untidy or wrinkled by creasing or crumpling
Example
She accidentally rumpled her dress while packing.
C2 adjective /ˈrævənɪŋ/

ravening

Meaning
Extremely hungry and greedy; voracious.
Example
The ravening wolves circled the camp.
C2 verb /rɔɪl/

roil

Meaning
to make a liquid muddy or disturbed; to cause agitation or disorder
Example
The constant protests roiled the city streets.
C2 noun /ˌrɛv.əˈkeɪ.ʃən/

revocation

Meaning
The act of officially canceling or withdrawing something.
Example
The court ordered the revocation of his license.
C2 noun /ˌrɛtroʊˈɡrɛʃən/

retrogression

Meaning
a return to a worse or less developed state
Example
The country experienced economic retrogression after the crisis.
C2 noun /ˈræbəl/

Rabble

Meaning
a disorderly crowd; the common people regarded as socially inferior
Example
The politician dismissed the protesters as mere rabble.
C2 verb /ˈrɔɪstər/

roister

Meaning
to revel noisily; to engage in loud, boisterous celebration
Example
The fans roistered in the streets after the victory.
C2 verb /rɪˈpruːv/

reprove

Meaning
to criticize or correct someone gently or disapprove of their actions
Example
The teacher reproved the student for being late.
C2 noun /ˈrɛkluːsəri/

reclusory

Meaning
A place for seclusion or retreat, especially for a recluse or hermit.
Example
The monk spent years in the reclusory away from society.
C2 noun /ˈrɛtɪnjuː/

retinue

Meaning
A group of attendants or followers accompanying an important person.
Example
The king entered the hall followed by his retinue.
C2 verb /rɪˈmɒnstreɪt/

remonstrate

Meaning
To make a forceful protest or objection.
Example
Citizens remonstrated against the new tax policy.
C2 adjective /rɪˈkʌmbənt/

recumbent

Meaning
lying down or in a resting position
Example
He was found recumbent on the sofa after a long day.
C2 verb /rɪˈfrækt/

refract

Meaning
To bend light, sound, or heat as it passes through a medium.
Example
The water refracts light, making the straw look bent.
C2 noun /ˈrɪvjʊlət/

rivulet

Meaning
a small stream of water; a tiny brook
Example
A rivulet ran down the hillside after the rain.
C2 noun /ˈræʃənəlɪzəm/

rationalism

Meaning
a belief or theory that opinions and actions should be based on reason and knowledge rather than religious belief or emotion
Example
Rationalism emphasizes logic and reasoning over faith.
C2 adjective /ˈrɪz.ə.bəl/

risible

Meaning
so absurd or ridiculous that it deserves to be laughed at
Example
The idea of flying pigs is completely risible.
C2 noun /ˈræp.aɪn/

rapine

Meaning
the violent seizure of someone's property
Example
The war was marked by rapine and destruction.
C2 adjective /rɪˈsplɛndənt/

resplendent

Meaning
Shining brilliantly; dazzling in appearance or effect
Example
The bride looked resplendent in her wedding gown.
C2 adjective /rɪˈfræɡəbəl/

refragable

Meaning
Capable of being refuted or disproved.
Example
His argument was weak and easily refragable.
C2 noun /rɪˈsɪdɪvɪst/

recidivist

Meaning
A person who repeatedly commits crimes, especially after having been punished.
Example
The police identified him as a recidivist who had been arrested several times before.
C2 noun /ˈrɛvəlri/

revelry

Meaning
Lively and noisy festivities, especially involving drinking and dancing.
Example
The sound of revelry could be heard throughout the night.
C2 adjective /rɪˈflɛksəbl/

reflexible

Meaning
Capable of being reflected or bent back.
Example
The surface was highly reflexible, bouncing light in different directions.
C2 noun /ˈriːbəs/

rebus

Meaning
a puzzle in which words are represented by pictures, symbols, or letters
Example
The children enjoyed solving the rebus puzzles in the magazine.
C2 noun, adjective, verb /ˈrɛprəˌbeɪt/

reprobate

Meaning
A person of immoral character; to express disapproval of; morally corrupt.
Example
The old reprobate spent his days gambling and drinking.
C2 noun /rɪˈkwaɪtəl/

requital

Meaning
The act of returning something, such as a favor, service, or punishment; repayment or retaliation.
Example
She offered her time in requital for his kindness.
C2 adjective /ˈrɛpərəbəl/

reparable

Meaning
able to be repaired or fixed
Example
The damage to the car was serious but still reparable.
C2 noun /rɪˈfrækʃən/

refraction

Meaning
The bending of light, sound, or other waves when they pass from one medium to another of different density.
Example
The refraction of light in water makes objects appear bent.
C2 adjective /ˌrɛpərˈtɔːriəl/

repertorial

Meaning
Relating to or characteristic of a repertoire, especially in journalism or performance contexts.
Example
The journalist's repertorial style captured every detail of the unfolding story.
C2 adjective /ˈrʌdi/

ruddy

Meaning
Having a healthy red color in the face.
Example
She had a ruddy complexion from working outdoors.
C2 noun /ˈrɪɡməˌroʊl/

rigmarole

Meaning
a long, complicated, and confusing process or story
Example
Getting a visa was such a rigmarole of paperwork and interviews.
C2 noun /ˌriːkəˌpɪtjʊˈleɪʃən/

recapitulation

Meaning
The act of summarizing or repeating the main points of something.
Example
The professor gave a brief recapitulation of the lecture before ending the class.
C2 noun /raɪm/

rime

Meaning
frost formed on cold surfaces by freezing water vapor
Example
The trees were covered with a white rime after the cold night.
C2 verb /ˈrʌstɪkeɪt/

rusticate

Meaning
To go to the countryside or to suspend someone from university.
Example
He decided to rusticate in the village to escape the busy city life.
C2 verb /rɪˈvaɪl/

revile

Meaning
to criticize in an abusive or angrily insulting manner
Example
The politician was reviled by the public for his corruption.
C2 adjective /ˈruːnɪk/

runic

Meaning
relating to or consisting of runes; mysterious or magical
Example
The old stone had strange runic carvings on it.
C2 adjective /ˈroʊziət/

roseate

Meaning
Having a pink color; optimistic or idealistic.
Example
She looked at the future with roseate optimism.
C2 verb /ˌriː.kəˈnɔɪ.tər/

reconnoiter

Meaning
to make a preliminary inspection or survey, especially of an area for military or strategic purposes
Example
The soldiers reconnoitered the area before advancing.
C2 noun/adjective /rɪˈmɒnstrənt/

remonstrant

Meaning
A person who makes a forceful protest (noun); protesting or objecting (adjective).
Example
He was a remonstrant voice in the assembly.
C2 adjective rɪˈtɛn.tɪv

retentive

Meaning
Having strong memory or the ability to retain information for a long time.
Example
Students with a retentive memory excel in academics.
C2 verb /ˌriː.kəˈpɪtʃ.ə.leɪt/

recapitulate

Meaning
To summarize and state again the main points of something.
Example
The teacher asked the student to recapitulate the lesson.
C2 adjective /ˈreə.rɪ.faɪd/

rarefied

Meaning
Of high moral, intellectual, or cultural value; distant from ordinary life.
Example
He works in the rarefied world of classical music.
C2 noun /ˈrɛd.ə.ləns/

redolence

Meaning
a pleasant smell or the quality of suggesting something strongly
Example
The redolence of jasmine filled the evening air.
C2 adjective /ˈrɛkənˌsaɪləbl̩/

reconcilable

Meaning
Capable of being resolved or made consistent.
Example
Their differences are reconcilable with honest communication.
C2 noun /ˈrɪp.lɪt/

ripplet

Meaning
a small or tiny ripple
Example
Tiny ripplets appeared on the lake as the fish moved.
C2 adjective /ræpˈtɔːriəl/

raptorial

Meaning
Relating to birds of prey or predatory behavior.
Example
The eagle is a raptorial bird with sharp talons.
C2 verb /rɪˈspaɪər/

respire

Meaning
To breathe in and out; to inhale and exhale.
Example
Plants also respire to release energy.
C2 adjective /rɪˈmɪs/

remiss

Meaning
Negligent in performing a duty or responsibility.
Example
The manager was remiss in not checking the financial reports carefully.
C2 noun/verb /ˈrɛkəmˌpɛns/

recompense

Meaning
to compensate someone for loss or harm suffered; compensation given for damage or injury
Example
The company offered financial recompense to the injured worker.
C2 adjective /ˈruːmi/

rheumy

Meaning
Watery, especially referring to the eyes.
Example
His rheumy eyes showed signs of age and fatigue.
C2 noun /ˈrɛkwiəm/

requiem

Meaning
A mass, music, or ceremony for the repose of the souls of the dead.
Example
The choir performed a requiem in memory of the late leader.
C2 adjective /rɪˈtɪkjʊlət/

reticulate

Meaning
Having a net-like pattern or structure.
Example
The leaf had a reticulate pattern of veins.
C2 verb /ˌriːkruːˈdɛs/

recrudesce

Meaning
to break out or appear again after a period of dormancy or decline
Example
After months of calm, violence recrudesced in the region.
C2 verb /rɪˈɡeɪl/

regale

Meaning
To entertain or amuse someone with stories, food, or drink.
Example
He regaled us with stories of his travels around the world.
C2 noun /ˈrɒndoʊ/

rondo

Meaning
a musical composition with a recurring leading theme
Example
The pianist ended the recital with a lively rondo.
C2 adjective /rɪˈfʌldʒənt/

refulgent

Meaning
Shining brightly; radiant.
Example
The refulgent sun lit up the entire valley.
C2 noun /ˈruː.mɪ.nənt/

ruminant

Meaning
a cud-chewing mammal, such as a cow or sheep
Example
Cows are ruminants that chew cud.
C2 adjective /ˈruːbɪkənd/

rubicund

Meaning
Having a healthy reddish complexion.
Example
The old man’s rubicund face showed he was in good health.
C2 noun /rɪˈpæst/

repast

Meaning
A meal or the food eaten during a meal.
Example
They enjoyed a delicious repast by the riverside.
C2 verb /rɪˈkænt/

recant

Meaning
to withdraw or renounce a statement or belief formally
Example
He recanted his previous statement in court.
C2 adjective /rɪˈdjuːsəbl̩/

reducible

Meaning
capable of being simplified, lessened, or made smaller
Example
The problem is complex but reducible to a few basic principles.
C2 noun /rɪˈfɛkʃən/

refection

Meaning
a meal or the act of taking food and drink
Example
The monks gathered for their evening refection.
C2 noun /rɪˈmɒnstrəns/

remonstrance

Meaning
A forceful protest or objection.
Example
The workers’ remonstrance against unfair treatment was ignored.
C2 noun /ˈrʊkəri/

rookery

Meaning
a place where rooks or other birds breed and nest in colonies
Example
We saw a rookery full of noisy birds near the forest.
C2 verb /rɪˈtrɛntʃ/

retrench

Meaning
to reduce costs, spending, or staff to save resources
Example
The company had to retrench employees due to financial difficulties.
C2 noun /ˌrɛprəˈbeɪʃən/

reprobation

Meaning
Strong disapproval or condemnation; rejection by God as beyond salvation.
Example
The teacher’s face showed clear reprobation at the student’s rude remark.
C2 adjective /rɪˈmiːdiəbl/

remediable

Meaning
capable of being corrected or cured
Example
The mistake was serious but still remediable.
C2 adjective /rəˈʃɛrʃ/

recherche

Meaning
Rare, exotic, or obscure, often in a sophisticated or refined way.
Example
The gallery displayed many recherche artworks from unknown artists.
C2 noun /roʊˈtʌn.də.ti/

rotundity

Meaning
the quality of being round or plump
Example
The rotundity of the balloon made it float gracefully.
C2 noun /ˈræpsədi/

rhapsody

Meaning
an expression of great enthusiasm or an epic musical composition
Example
The singer’s performance was a rhapsody of emotions.
C2 adjective /rɪˈfjuː.tə.bəl/

Refutable

Meaning
capable of being proven wrong or false; able to be disproved
Example
His theory was refutable because it could be tested experimentally.
C2 noun /ˈriːdʒənt/

regent

Meaning
a person who rules in place of a monarch when the monarch is absent or too young
Example
The prince acted as regent until the king came of age.
C2 adjective /ˈræfɪʃ/

raffish

Meaning
unconventional and slightly disreputable but attractive
Example
He had a raffish charm that made him popular in the city.
C2 noun /rɪˈvaɪ.zəl/

revisal

Meaning
The act of revising, reviewing, or making changes to something.
Example
The revisal of the contract took longer than expected.
C2 adjective /rɪˈprɛsəbl̩/

repressible

Meaning
Capable of being restrained or suppressed.
Example
The movement proved to be hardly repressible.
C2 noun /roʊˈtʌn.də/

rotunda

Meaning
a large circular building or hall, often with a dome
Example
Tourists gathered inside the grand rotunda of the capitol.
C2 noun /rɪˈsɪʒən/

rescission

Meaning
the cancellation or annulment of a law, contract, or agreement
Example
The rescission of the contract left both parties disappointed.
C2 noun /rɪˈɡætə/

regatta

Meaning
A sporting event consisting of a series of boat or yacht races.
Example
The annual regatta attracted competitors from around the world.
C2 noun /rɪˈkɒɡnɪzəns/

recognizance

Meaning
A legal obligation or bond entered into before a court, especially to ensure future appearance.
Example
He was released on his own recognizance.
C2 noun /ˈrɛv.ər.i/

reverie

Meaning
A state of being pleasantly lost in one's thoughts; a daydream.
Example
Lost in reverie, he didn't hear his name being called.
C2 adjective /ˈrɛkriənt/

recreant

Meaning
cowardly or unfaithful to duty
Example
The recreant soldier abandoned his post in fear.
C2 verb /ˈreə.rɪ.faɪ/

rarefy

Meaning
To make something less dense or more refined.
Example
The air rarefies as you climb higher into the mountains.
C2 adjective /rɪˈzɪstləs/

resistless

Meaning
Impossible to resist; having an overpowering effect.
Example
She felt a resistless urge to laugh at the joke.
C2 adjective /ˈræŋ.kər.əs/

rancorous

Meaning
Characterized by bitterness or resentment.
Example
Their rancorous debate lasted for hours.
C2 adjective /rɪˈflɛktɪbəl/

reflectible

Meaning
capable of being reflected, as light or an image
Example
The surface of the lake is highly reflectible in the morning sun.
C2 noun /red ˌəʊ.liˈæn.dər/

Red oleander

Meaning
a poisonous flowering shrub with bright red or pink flowers
Example
The red oleander blooms throughout the summer months.
C2 noun /rɪˌdʒuːvəˈnɛsəns/

rejuvenescence

Meaning
the action or process of becoming young or fresh again
Example
The forest showed signs of rejuvenescence after the rains.
C2 noun /ruːθ/

ruth

Meaning
A feeling of pity, compassion, or sorrow.
Example
He felt no ruth for the people he had betrayed.
C2 verb /rɪˈdaʊnd/

redound

Meaning
to contribute greatly to a result or consequence, usually beneficial
Example
His hard work will redound to the success of the company.
C2 adjective /roʊn/

roan

Meaning
denoting an animal, especially a horse, having a coat of mixed colors, typically reddish-brown and white
Example
The rider mounted a roan horse with a speckled coat.
C2 verb /rɪˈkjʊə/

recure

Meaning
to cure again; to remedy a second time
Example
The doctor had to recure the wound after it reopened.
C2 noun /ˌræproʊʃˈmɑːn/

rapprochement

Meaning
The establishment or resumption of harmonious relations.
Example
The two countries signed an agreement that marked a new rapprochement.
C2 noun /ˈræɡəmʌfɪn/

ragamuffin

Meaning
A person, typically a child, in ragged, dirty clothes.
Example
The little ragamuffin begged for food on the street.
C2 noun /rɪˈfrɪndʒənsi/

refringency

Meaning
The ability of a substance to bend light; refractive power.
Example
Glass has a higher refringency than water.
C2 adjective /ˈrɛkənˌdaɪt/ or /ˈrɛkəndaɪt/

recondite

Meaning
Little known or difficult to understand.
Example
The professor’s lecture was full of recondite theories.
C2 adjective /ˈrɪbɔːld/

ribald

Meaning
Referring to sexual matters in a humorous or vulgar way.
Example
The comedian’s ribald jokes made the audience laugh uncomfortably.